32 results about "Stack effect" patented technology

A support is provided with a hollow-out structure used for forming air circulation in the horizontal direction, a shielding body comprises an outer plate and an inner plate, the outer plate is arranged on the support, the vertical projection of the outer plate at least covers equipment, and the outer plate inclines towards the periphery of the outer plate along the vertex position of the middle of the outer plate. An air outlet is formed in the upper portion of the outer plate, multiple air inlets are formed in the lower portion of the outer plate, the inner plate is arranged on the support, or a top cavity is formed in the lower end face of the outer plate, and the air inlets are communicated with the top cavity. The outer plate can achieve the rain shielding function, the air inlet holes and the air outlet holes in the outer plate and the top cavity form an air channel, air can enter from the air inlet holes and then conduct heat transfer with the upper end face of the inner plate, then the air is exhausted from the air outlet holes, and cooling of the inner plate is achieved. The self-cooling structure with the flow guide function continuously cools the shielding body through the chimney effect of hot air, is simple in structure, safe and reliable, and can avoid high-temperature damage.

The invention discloses a house air conditioner control system combined with a passive energy-saving mechanism, and particularly relates to the field of energy conservation and air conditioner control, which comprises an acquisition and analysis module, an over-limit air supply module, a fallback shutdown module, a dynamic heat release module and a coordination switching module, the collection and analysis module collects indoor temperature data at an indoor air outlet and underground air temperature and humidity data at an underground fresh air inlet, and combines the collected data with a historical temperature curve and a solar radiation change trend to generate a trend analysis result. Solving a prediction result of room temperature future overrun or falling based on a trend analysis result; according to the scheme, by introducing trend prediction and judgment logic and combining passive adjustment paths of underground air circulation, the phase change heat storage unit and the chimney effect, collaborative operation of feed-forward control and feedback correction is achieved in all the modules, and the problems of adjustment delay and energy consumption amplification caused by sensing delay and execution inertia are solved.

The invention discloses a modular electromechanical pipeline roof crossing protection device and a construction method, the modular electromechanical pipeline roof crossing protection device comprises a fixed base, a concrete structure floor and a roof layer, the fixed base is pre-buried in the concrete structure floor and the roof layer, and a water stop wing ring is arranged on the periphery of the fixed base; the protective outer cylinder is fixedly connected with the fixed base, the protective outer cylinder is provided with an outwards-turned flange edge, a valve is arranged in the middle of the protective outer cylinder, and the valve is connected with the side wall of the protective outer cylinder through a fastening assembly. The fireproof plugging module is arranged on the inner side wall of the fixed base; the outer side of the fixed base is fixedly connected with the heat preservation outer sleeve. The fireproof plugging module capable of being pulled, inserted and replaced is arranged, the excellent fireproof performance is achieved, the module is formed by compounding a ceramic fiber felt, an expanded graphite strip and fireproof glue or is composed of rock wool, fireproof mud and a fireproof bag according to different pipeline types, reliable fireproof plugging is ensured, and the chimney effect in a fire disaster is effectively prevented.

A light fixture that utilize multiple sheets of MCPCB for reduced costs, weight, and thermal, mechanical, and / or optical controls. In other embodiments, a heat sink may be formed by extruding a block of material to form a heat sink that utilizes a venturi and chimney effect, which may include attached MCPCB. Specific embodiments may utilize a plurality of MCPCB sheets or other pliable materials, which may be mirrored over a central axis or an extruded heat sink to create an open upper surface with a chimney effect

The present invention discloses a novel building structure and control method for alleviating the chimney effect of high-rise buildings. The structure relates to the fields of building technology and elevators, and includes a pressure relief shaft, a one-way airflow channel, a pressure relief mechanism, a monitoring system, and an intelligent control system. The pressure relief shaft is arranged on one side of the elevator shaft, the one-way airflow channel is arranged on the top and bottom floors of the pressure relief channel, the pressure relief shaft is connected to the elevator shaft through the one-way airflow channel, the pressure relief mechanism is respectively arranged above the pressure relief shaft and the elevator hall door, and the monitoring system includes a pressure plate, an indoor thermometer, and an outdoor thermometer. The pressure plates are arranged on both sides of the elevator hall door, the indoor thermometers are evenly arranged in the elevator shaft, and the outdoor thermometer is arranged on the outer wall of the building. The pressure relief mechanism, the pressure plate, the indoor thermometer, and the outdoor thermometer are all electrically connected to the intelligent control system. The present invention can reduce the impact of the chimney effect on elevator operation and ensure the smooth operation of the elevator.

The invention discloses a smoke-proof device for an elevator hall of a refuge floor and a using method of the smoke-proof device, the smoke-proof device comprises a door-shaped sealing frame, a roller shutter assembly, a driving motor and a transmission assembly, the roller shutter assembly comprises a rolling shaft, fireproof cloth and a traction rod, a fireproof air bag structure composed of a first air bag and a second air bag is arranged in the sealing frame, and top-side-bottom three-dimensional sealing can be formed. According to the method, rapid unwinding of the fireproof cloth is achieved through electric driving, and an air bag is inflated to complete all-dimensional sealing; when power is cut off or the motor breaks down, the pull rope is pulled down to separate the transmission assembly, and the fireproof cloth is manually unwound through the gravity of the traction rod. Positive pressure smoke prevention is replaced by physical sealing, the smoke prevention device is free of chimney effect and wind interference, gets rid of power dependence, is simple in structure, convenient to maintain and stable and lasting in smoke prevention efficiency, effectively guarantees safety of the refuge storey, and is suitable for various high-rise building refuge storey elevator halls.

This invention provides an intelligent prediction method and system for village fire spread paths, relating to the fields of fire science and computer physics simulation technology. The invention acquires three-dimensional spatial topological data and meteorological parameters of the village; through a street-valley and chimney effect coupled simulation module, combined with alleyway aspect ratio, slope, and wall roughness, it quantifies the wind field variation vector and spontaneous suction air volume under narrow terrain; through a multi-source fire leap-forward extrapolation module, it constructs a dynamic model covering fire generation, micro-topographic lift correction flight, and physical constraints of triggering conditions, extrapolating the coordinates of secondary fire jump points and filtering false fire alarms; through a radiation feedback and dynamic prediction module, it calculates the superposition of heat radiation from multiple reflections within the building angle to assess the risk of premature spontaneous combustion, and performs adaptive path replanning based on the monitoring logic of meteorological deflection and building collapse abrupt changes. This invention objectively recreates the discontinuous fire spread process at the microscale, improving the timeliness of prevention and rescue decisions.

This invention relates to a foundation wall structure suitable for EPS board thin-plastered exterior wall insulation systems. The purpose is to address the problems of existing building walls being prone to chimney effects and insulation layer detachment during fires. This invention's foundation wall structure is constructed from multiple masonry blocks; each cavity of a block is fitted with a cover plate, and support strips are positioned between upper and lower blocks. By incorporating a horizontal annular flange and cover plate in the center of each cavity of the block, the resulting cover plate vertically isolates airflow, preventing the chimney effect caused by vertically connecting the channels of the building blocks, thus improving the fire resistance of the exterior wall insulation system. The support strips support the EPS insulation board and corresponding fixing components, providing support and increasing the connection strength between the foundation wall structure and the EPS insulation board, reducing the risk of insulation layer detachment.

The invention discloses a pumped storage power station high-fall cable tunnel fire characteristic analysis system, and the system comprises a reduced-size cable tunnel which is used for placing a cable and is internally provided with a movable fireproof separation plate for adjusting a fireproof interval; the hydraulic mechanism is arranged below the reduced-size cable tunnel at a tunnel slope; the data acquisition module is used for acquiring fire characteristic parameter data generated in the cable combustion process when the tunnel is at different fireproof intervals and gradients; the data analysis module is used for performing dynamic inversion of the cable fire spreading process based on the fire characteristic parameter data; the comparison and verification module is used for comparing the test result with the fire prediction model to verify the model; the fire protection effect evaluation module is used for evaluating fire protection effects of different gradients and fireproof intervals by adopting an entropy weight method; according to the invention, cable fire spreading characteristics and smoke flow characteristics under the influence of chimney effect in cable tunnels with different gradients, and smoke flow characteristics and self-extinguishing characteristics in a high-fall closed cable tunnel are simulated and analyzed.

The utility model discloses a device for adsorbing dust by utilizing static electricity in a chimney. The device comprises a lower spraying and flushing pipe, a lower supporting piece, a lower flue gas guide plate, an annular roll control plate, a filler dust collection ball, a flue gas baffle, an upper flue gas guide plate, an upper supporting piece, an upper spraying and flushing pipe, a tower body, a fixing frame, a flue gas inlet pipeline and a flue gas exhaust pipeline, the inner wall of the tower body is fixedly connected with a flue gas baffle, the flue gas baffle is fixedly connected with a lower flue gas guide plate and an annular coil control plate, a filler dust collection ball is arranged between the lower flue gas guide plate and the annular coil control plate, and the top end of the lower flue gas guide plate is provided with an upper flue gas guide plate; the device is placed at the uppermost end of the desulfurization tower, the chimney effect is fully utilized, the natural rising force of flue gas is enhanced by utilizing the air flowing phenomenon caused by the temperature difference of air inside and outside a chimney, and therefore the wind resistance of a flue is greatly reduced, energy consumption is reduced, and the overall efficiency of a flue gas emission system is improved.

The present application belongs to the field of building technology, and particularly relates to a manhole with natural lighting and natural ventilation functions, and a construction method of the manhole. The manhole comprises a PC lighting cover, a stainless steel connecting piece, a sealing strip, a rotating shaft, a galvanized steel plate base, a right-angle pressing strip, a knob switch, a square steel tube, a hydraulic support rod and a connecting steel plate. The PC lighting cover is connected with the stainless steel connecting piece, and the stainless steel connecting piece is connected with the galvanized steel plate base through the rotating shaft. The manhole has the following advantages: (1) the chimney effect is utilized, and indoor dirty air can be discharged without consuming electric energy, so that natural ventilation is realized; (2) the PC lighting cover is dome-shaped, has strong anti-impact capacity and can realize self-cleaning function; and (3) natural lighting can be realized due to the diffuse reflection principle of the PC diffusion plate, and the light is uniform and soft, so that direct strong light and glare are avoided.

The application provides a fireproof system and a high-rise building fireproof method, and relates to the technical field of fireproof systems.The fireproof system comprises a liftable protection unit, a driving unit, a detection unit and a control unit, realizes early automatic detection and rapid response of a building outer facade fire, moves the liftable protection unit to above a fire source along a guide rail through control, starts a wind power generating part to generate downward airflow, can form a wind pressure barrier on a spreading path, effectively interferes and suppresses upwardly rising flames and high-temperature smoke gas due to a 'chimney effect', delays vertical spreading of the fire along an outer wall, not only saves valuable time for vertical evacuation of people in the building and transfer to a roof platform, reduces escape risks, but also creates more favorable conditions for rescue of external fire fighting forces, and improves active protection ability and overall safety resilience of high-rise buildings in response to such fires.

The application provides a power distribution network operation state multi-dimensional analysis and management and control method, comprising: obtaining external surface temperature distribution data from each area of a switch cabinet wall, obtaining airflow flow rate and flow direction information from a bus gap, simultaneously collecting temperature window inner wall and outer wall temperature data, and obtaining real-time airflow field distribution characteristics; evaluating the chimney effect strength level of a three-phase bus vertical arrangement area according to the real-time airflow field distribution characteristics, and determining the thermal superposition interference area range affected by the chimney effect in combination with the temperature window inner wall temperature data; performing sliding regression fitting on the accurate joint temperature estimation value according to a time window, and generating an overheating point positioning alarm signal when the change rate of the temperature abnormal rise trend exceeds a preset safety upper limit in a plurality of continuous sampling periods.

The application discloses a vehicle base vertical shaft chimney effect intelligent combined ventilation system based on an upper cover, belongs to the technical field of vehicle base ventilation, and comprises a mechanical ventilation device, further comprises a pre-value analysis module, a regional division unit, a shaft ventilation analysis module, a combined control module and a machine ventilation control and adjustment unit. The combined judgment value is obtained by comprehensively analyzing and calculating the total flux value and the base ventilation judgment value, whether to start the mechanical ventilation is determined according to the comparison between the combined judgment value and the combined judgment threshold value, and the machine ventilation control and adjustment unit is used for flexible control after the mechanical ventilation is started, so that the efficiency of the mechanical ventilation used in the vehicle base and matched with the natural ventilation of the building vertical shaft is higher, the energy consumption of the mechanical ventilation system is further controlled, and the electric power energy consumption is reduced.

The invention relates to the technical field of photo-thermal power generation, and particularly discloses a cooling method of a heat absorption tower and an air cooling heat absorption tower. According to the method, intelligent conversion from traditional air cooling constant air volume to on-demand air supply is achieved through intelligent control driven by temperature difference, a system monitors in real time and makes full use of the natural chimney effect, and only when natural ventilation is insufficient, the air cooling effect is achieved. Therefore, the invalid operation time and the power consumption of the fan are reduced to the maximum extent, and the power utilization rate of a power station is remarkably reduced. Meanwhile, a closed-loop automatic control system based on real-time temperature difference feedback can accurately respond to changes of power station loads and environmental conditions, stable and sufficient cooling air volume is provided for dead steam condensation all the time, and reliable operation of a cold end system is guaranteed. Due to high automation control, complexity and uncertainty of manual intervention are reduced, and the intelligent management level and operation stability of the whole power station are improved.

This application relates to a European-style transformer substation chimney-type heat dissipation top cover, belonging to the technical field of power equipment heat dissipation. It includes a top cover body, with a ventilation mechanism at the top of the top cover body. The ventilation mechanism includes two fixed frames, the bottom ends of which are fixedly connected to the top of the top cover body. A waterproof cover plate is fixedly connected to the top of each fixed frame. A ventilation fan is fixedly connected inside each fixed frame. A ventilation opening is provided between the fixed frame and the waterproof cover plate. A reinforcing assembly is provided at the bottom of the top cover body, including multiple vertical fixing plates, the external parts of which are fixedly connected to the bottom of the top cover body. The advantage of this application is that the ventilation mechanism at the top of the top cover combines a chimney-type structure with a ventilation fan. When the transformer substation generates heat during operation, the fan drives air to flow upwards through the ventilation openings, utilizing the chimney effect to accelerate the discharge of hot air.

The invention belongs to the technical field of power transmission and transformation projects, and particularly relates to an automatic temperature control structure suitable for a transformer substation, which comprises a temperature measuring device and a transformer substation roof. Wherein the temperature measuring device is arranged on the inner side wall of the transformer substation and is used for detecting the temperature in the transformer substation; meanwhile, a window is formed in the transformer substation roof, a structural beam and a displacement device are arranged in the transformer substation roof, and the top of the displacement device is connected with and supports the tempered glass window; and the temperature measuring device is electrically connected with the displacement device. When the temperature measuring device detects that the temperature in the transformer substation exceeds a preset threshold value, the temperature measuring device transmits information to the displacement device, and the displacement device can enable the tempered glass window to move horizontally and / or vertically, so that the window is opened, the chimney effect is formed, indoor air convection is enhanced, and the temperature control effect is achieved.

A light fixture that utilize multiple sheets of MCPCB for reduced costs, weight, and thermal, mechanical, and / or optical controls. In other embodiments, a heat sink may be formed by extruding a block of material to form a heat sink that utilizes a venturi and chimney effect, which may include attached MCPCB. Specific embodiments may utilize a plurality of MCPCB sheets or other pliable materials, which may be mirrored over a central axis or an extruded heat sink to create an open upper surface with a chimney effect

The present application relates to the technical field of photo-thermal power generation, and specifically discloses a cooling method of a heat absorption tower and an air-cooled heat absorption tower. The present application realizes the intelligent transformation from the traditional air cooling "constant air volume" to "on-demand air supply" through the intelligent control of temperature difference driving, and the system monitors in real time and fully utilizes the natural chimney effect. Only when the natural ventilation is insufficient, the fan starts to compensate, thereby minimizing the invalid operation time and power consumption of the fan, and significantly reducing the power station auxiliary power rate. At the same time, the closed-loop automatic control system based on real-time temperature difference feedback can accurately respond to the changes of power station load and environmental conditions, always providing stable and sufficient cooling air volume for the exhaust steam condensing, and ensuring the reliable operation of the cold end system. The high degree of automatic control reduces the complexity and uncertainty of manual intervention, and improves the intelligent management level and operation stability of the entire power station.

The utility model belongs to the technical field of earthen archaeological site protection, and particularly discloses a cultural relic archaeological site body humidity control device based on a chimney effect, which comprises a double-layer glass curtain wall arranged around an earthen archaeological site, an exhaust dehumidification pipeline system arranged in an earthen archaeological site foundation and matched with the double-layer glass curtain wall, and a ceiling matched with the double-layer glass curtain wall, the double-layer glass curtain wall comprises an inner-layer glass plate and an outer-layer glass plate, and an air cavity is formed between the inner-layer glass plate and the outer-layer glass plate. The exhaust dehumidification pipeline system comprises a pipeline net rack communicated with the air cavity; by means of the chimney effect formed by the fact that air in the air cavity in the double-layer glass curtain wall rises after being heated, moist air in the earthen archaeological site is guided to flow into the exhaust pipeline at the bottom of the earthen archaeological site foundation along the exhaust hole and then is exhausted out of the earthen archaeological site ceiling along the air cavity, the moist air in the earthen archaeological site can be exhausted, and the earthen archaeological site is protected. The purpose of automatic air exhaust and dehumidification in the earthen archaeological site environment is achieved.

The application discloses a kind of houses air conditioning control systems combined passive energy-saving mechanism, specifically relates to energy saving and air conditioning control field, including acquisition analysis module, over-limit air supply module, fall stop module, dynamic heat release module and coordination switching module;Acquisition analysis module is by collecting the indoor temperature data at indoor exhaust port and the underground air temperature and humidity data at underground fresh air inlet, the trend analysis result is generated by combining the collected data with historical temperature curve and solar radiation change trend, and the prediction result of future over-limit or fall of room temperature is solved based on trend analysis result;The scheme introduces trend prediction and determination logic, and combines the passive adjustment path of underground air circulation, phase change heat storage unit and chimney effect, to realize the cooperative operation of feedforward control and feedback correction in each module, to solve the problem of regulation delay and energy consumption amplification caused by sensing lag and execution inertia.

The invention discloses a super high-rise building chimney effect regulation and control method and system based on cold air drainage, and relates to the technical field of building physics. In the heating season, the internal temperature and the outdoor temperature of a large-stroke shuttle elevator shaft are collected in real time; when the outdoor temperature is higher than the preset temperature, all the holes are closed; when the outdoor temperature is lower than the preset temperature and the indoor and outdoor temperature difference is smaller than 8 DEG C, all holes are closed; when the outdoor temperature is lower than the preset temperature and the indoor and outdoor temperature difference is larger than 8 DEG C, all holes are opened, outdoor cold air enters the large-stroke shuttling elevator shaft and is mixed with hot air in the large-stroke shuttling elevator shaft, the air temperature in the large-stroke shuttling elevator shaft is reduced, and the hot pressure difference generated by the temperature difference is weakened; and the pressure difference delta P of the elevator landing door does not exceed 65Pa. According to the invention, drainage of cold air is realized, so that the problem of chimney effect caused by temperature difference is effectively reduced. And therefore, the situation that the elevator door cannot be normally opened and closed is reduced, and the safety and normal operation of the elevator are guaranteed.

The invention provides a distribution box for outdoor cable laying, and particularly relates to the technical field of distribution boxes, the distribution box comprises a main box body, the top of the main box body is provided with a top cover, the bottom of the main box body is provided with at least three wire inlet bottom holes, and lower convection holes are symmetrically distributed in the positions, close to the bottom, of the two sides of the main box body; according to the distribution box for outdoor cable laying, a flow guide channel for guiding the convection mechanism is utilized to change the airflow speed through the gradual change design of the cross section, and the graphene heat conduction coating on the inner wall is matched to quickly transfer element heat, so that the heat transfer efficiency is improved, and the heat transfer efficiency is improved. The Venturi effect accelerates airflow and the chimney effect strengthens air exchange, so that the heat exchange efficiency in the main box body is greatly improved, the problem of performance degradation caused by insufficient heat dissipation of elements in the distribution box in an outdoor high-temperature environment is effectively solved, and safe operation of cables in the distribution box is ensured.

The present invention discloses an active ground wave radar heat dissipation structure based on the chimney effect, comprising a base, a transmitting module, a lower rod, and an upper rod coaxially arranged from bottom to top; an air inlet is provided at the bottom of the transmitting module; the lower and upper rods are both hollow structures, and an air outlet is provided on the top side wall of the upper rod; the air inlet, the hollow cavity of the lower rod, the hollow cavity of the upper rod, and the air outlet together constitute a chimney channel, and the effective height of the chimney channel shall not be less than 5m; the area of ​​the air outlet is close to the area of ​​the air inlet; and a light-transmitting cover with a heat-collecting material attached is provided in the middle of the chimney channel. The present invention is based on the self-suction effect of the chimney effect, which increases the air flow rate in the air flow channel, enhances the air convection effect on the surface of the heat dissipation fins, and improves the heat dissipation efficiency, thereby meeting the use requirements of passive heat dissipation and improving the safety and reliability of the active ground wave radar. In addition, the light-transmitting cover can increase the temperature at the midpoint of the chimney channel, making the wind speed at the air outlet greater than the wind speed at the midpoint, effectively improving the thermal pressure ventilation effect.

The invention relates to the technical field of power transformation box heat dissipation, in particular to an unpowered heat dissipation top cover of a prefabricated substation, which can be mounted at the top of a substation box body and is used for guiding heat inside the substation box body to the outside of the substation box body, and comprises a heat dissipation assembly, the heat dissipation assembly comprises a chimney structure installed on the top of the transformer substation box body and a coanda effect top cover installed on the top of the chimney structure, and a channel for hot air circulation is arranged between the top of the chimney structure and the bottom of the coanda effect top cover. Unpowered efficient heat dissipation is achieved through the coanda effect and the chimney effect, the structure is simple, cost is low, and the heat dissipation effect is good.

The invention provides an unpowered photovoltaic curtain wall negative ion ventilation system. The unpowered photovoltaic curtain wall negative ion ventilation system comprises a building envelope structure, a photovoltaic curtain wall, an air negative ion release structure, flow guide equipment and a ceiling type air conditioning box. A ventilation channel is reserved between the photovoltaic curtain wall and the surface of the building envelope; the air negative ion release structure is located in the ventilation channel, when the photovoltaic curtain wall conducts photovoltaic conversion, the air negative ion release structure generates a chimney effect under the heat effect of a back plate of the air negative ion release structure and forms air negative ions with air in the ventilation channel, and the ventilation channel forms rising negative ion airflow under the chimney effect. The negative air ions are introduced into the ceiling type air conditioning box through the flow guide equipment, the treated airflow is output to the internal space of the building envelope after the negative air ion airflow is treated, the three functions of power generation, negative air ion generation and natural ventilation are integrated, and the energy consumption of the negative air ion ventilation system is reduced.

The present invention proposes a heat storage brick that forms a vertical and multi-horizontal branch three-dimensional air duct system, which belongs to the field of heat storage technology. It includes horizontal grooves, vertical grooves, anchoring protrusions, etc. Vertical grooves are used to form vertical air ducts that are parallel in space and communicate with the horizontal channels formed by the horizontal grooves; the vertical air ducts are staggered to form the main air ducts for air inlet and outlet, and the horizontal channels automatically form multi-branch parallel branches, thereby establishing a three-dimensional air duct system. The chimney effect is fully utilized, and the upper surface, lower surface and side surfaces of the heat storage bricks are incorporated into the heat exchange air duct, thereby achieving balanced inlet air temperature difference, increasing heat exchange area, reducing temperature gradient, promoting heat exchange flow, and balancing air duct pressure, etc., significantly reducing the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, and improving heat storage capacity, heat absorption and heat release efficiency and dynamic response performance. The original structure is fully utilized to form a meshing and anchoring relationship, simplifying the heat storage brick structure and processing technology.

The present application relates to the technical field of building construction, in particular to an energy-saving passive light and ventilation skylight and a construction method thereof. The skylight comprises a PC light cover, a galvanized steel plate base, a PC durability plate rainproof shed, an aluminum alloy foamed rolling shutter window, an aluminum alloy shutter, an aluminum alloy filter screen, a square steel tube, a right-angle pressing strip, a connecting steel plate and a groove. The PC light cover is connected with the galvanized steel plate base, and a square steel tube is vertically welded on one side of a ventilation opening of the galvanized steel plate base. The aluminum alloy shutter and the aluminum alloy filter screen are horizontally installed on the square steel tube. One side of the galvanized steel plate base is provided with a ventilation opening, and the upper part of the ventilation opening is provided with the PC durability plate rainproof shed and the aluminum alloy foamed rolling shutter window. The passive light and ventilation energy-saving window is connected with the roof through the right-angle pressing strip and the connecting steel plate. The present application utilizes the "chimney effect" and sets a reasonable ventilation structure, so that the indoor dirty air can be discharged and natural ventilation can be realized without consuming electric energy. Compared with the same type of invention, the present application has a lower cost and is more convenient to construct.

The utility model belongs to the technical field of prefabricated parts, and particularly relates to a wear-resistant and high-temperature-resistant special-shaped prefabricated part which comprises a first part, a second part and a connecting part, the first part and the second part are connected through the connecting part, and the upper surface of the connecting part and the lower surface of the first part are completely coincident and integrally formed. Due to the fact that the first part and the second part are arranged in a staggered mode, abrasion resistance is better, and the four side faces of the first part and the four side faces of the second part are not located on the same plane. Compared with a linear gap, the bending gaps are formed in the peripheries of the special-shaped prefabricated parts, so that high-temperature heat flow cannot directly enter the heat preservation layer through the gaps, the flow direction of the heat flow is changed through the bending gaps, the stacking effect is good, and the heat preservation effect is good. And the thermal insulation layer is more resistant to high temperature.

The invention discloses a landing display for solving the chimney effect problem, which comprises a display part and a ventilation part, and is arranged on the wall surface of an elevator waiting hall on the outer side of an elevator shaft; the display part is provided with a display panel; the ventilation part is fixed on the rear side of the display part; a top through hole and a back through hole of the ventilation part form an air circulation path, the ventilation part covers a pressure relief opening of an elevator shaft, and the back through hole is communicated with the pressure relief opening; and a separation net is mounted at the top through hole. On the premise that attractiveness is not affected, the problem of chimney effect is solved by communicating the rear space of the landing display with the well pressure relief opening.